Typewriting machine



Nov. 3', 1925. 1,560,249 l A. G. F. KUROWSKI` TYPEWRITING MACHINE Filed Aug. 4, 1922 2 Sheets-Sheet l 9 2 4 t 2, m m 5, 1 .n s 2 m SW2 wm2 oww RM' vUGA. mw :MIA R .Wd 6mm, Aww.. 5 2 9 l 3. v, 0 N

/nven for Patented Nov. 3, 1925.

UNrrEn STATES( PATENT OFFICE.

ALFRED e. F. KUROWSKI, or BROOKLYN, NEW YORK, AssIGNOR To UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION or DELAWARE TYRRWRITING MACHINE.

yApplication filed August 4, `1922.l Serial No. 579,560.

T 0 all whom it may concern.'

Be it known that I, ALFRED G. F. KUROW- sKi, a citizen of the UnitedStates, residlng in Brooklyn Borough, in the county of Kings, city and State of New York, ,have inventedl certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

The present invention relates to sounddeadening casings for ltypewriting 1na chines; that is to Say, to casings in which the machine may be Operated with a minimum of noise. The invention also relates to .certain features of the machine itself `for enhancing the deadening of sound when the machine is within the casing, and for the more successful operation of the same within the casing.

An object of the invention is provision of simple and novel means whereby (more particularly for access to the types) the casing may be opened in the immediate vicinity of the keyboard. i

A feature of the invention is the provision of cover-opening means which may, except for a projecting finger or palm piece, be wholly contained within, and thus protected by, the casing; and which, therefore, besides offering a neat-appearing casing, offers a casingV in which the walls thereof require a minimum of openings; thus simplifying its manufacture, and reducing to a minimum the. joints to be closed against emission of sound.

The character of casing to which the invention, more particularly as to certainfeatures thereof, has reference, is a casing having an opening in the front wall thereof, of sufficient size to permit passage therethrough of the keyboard o-f the machine when the machine is inserted into the casing through the top of the latter. In such a casing the front plate of the typewriting machine serves (when the machine is in place) as a closure for the openingl in the front wall of the casing, above the keyboard extension of the machine. In front-strike typewriting machines in which the type-bars swing upward and rearward to the platen, and in normal position form va segmental typebasket, the front plate of the machine has a segmental opening therein for access to the type-bars for cleaning. In order, therefore, that the front plate of such a machine may close the opening in the front Wall of a casing of the character mentioned, a removable ormovable, ,plate or door, tof close the segmental .opening in the front plate of the machine, has heretofore been provided. To permit of access' for cleaning, such` door plates have been bodily removable from the interior of the casing when the casing is opened.V Y

An object of the `present invention is the provision of a sound-deadening door or( plate for the purposes mentioned, which door may be opened and closed by a simple movement, without otherwise opening the casing, and without bodily removal of the door.k

A feature of the invention is a mounting of the door on the front plate of the machine, permitting the door to be swung Open on hinges by a finger-piece thereon; and in which provision is made for sealing, against the emission of sound, the joint between the door and the front plate of the machine, when the door is closed.

:A further feature of the invention is a construction of the door itself, whereby it is rendered sound-proof by the incorporation of a sheet of sound-deadening material therein, and whereby the softer sound-dead ening material is covered and protected from displacement or injury; the whole being easily and securely assembled. j f

In casings of the character mentioned, the platen-.carriage of the machine, with the line-space and other handles thereon, has movement in letter-feed and return directions. `In order that the line-space lever may move lwith the carriage and nevertheless beoperable from the outside of the casing, a slot is provided in the casing longitudinally of the front thereof; and, to seal this slot against emission of sound, itsedges have cushions which close it, except where the levers on the carriage project therethrough. These cushions necessarily exert a frictional pressureon the levers, and this pressure Oppose's the spring ordinarily employed for returning the line-space lever to normal poof a spring-return device for the line-space lever, anda mounting and setting of the spring thereof, which will act with Vcertainty, and which will withstand long and severe use without injury `or breakage.

Other features and advantages will hereinafter appear.

In the accompanying drawings, N Figure 1 is a view,'in 'crossfsectional side elevation, of a casing equipped with the present invention; ya typewriting machine being indicated inV dotted Ilines "within the casing. Figure 2is fa'view,in front 'elevatiomof the casing of Figure 1 partly'broken away; the machine being "shown in the casing, and the' machine Tand the casing having thereon the devices of the present invention.

Figure3 is a top plan view showing the line-'space lever andy 'connections"thereof to the platen-shaft. A p A Referringv lto the drawings, th'e casing is shown as comprising a body-portion 10 haviii-g acover-portion 11 hinged'at 12there`to. The side 'walls of the body-portion arelined with sound-deadening material` which isnot shown yexcept at 113, at the `frofntft`hereot The body-portion 'is 'also proyffidedwith a base-,piece 14 'o's'ound-deadening material, which may be secured thereto screws. The walls of the cover vare lalso lined with sound-deadenin'g materialfnot shown, except 'at 11EL in `Figure-2, Thetoverlis provided with a window 15, of `glass,"or other transparent material, through "which fthe writing on the platen maybe observed. The machine 16, indicated indotted linesjis inserted through the-top 'ofthe casing-body when lthe cover is open. In inserting the same, it fis tiltedl forward ,andfdownward so thatr the 'keyboard' 'extension 17 v thereof'fmay be `passed through an opening 18 inthe front wall'of the casing-body. It is Athenlet "down until its front land rear feet 19,20 restupon the base-piece 14, `with the rear feet :2O locators 21 which aresec'ur'ed'toy the re'arfwall of the 'casing-body, and withlthe front' feet 19 in suitable 4locators, not shown. v

In'order that there may be room V'for movement fof the .carriage 22 of the'machine with 'thefplaten 23 in letter-feed and returndirections, the casing vis `ei'qoanded laterally outward `and upward, as indicated l`at 24 in Figure 2; and, in order that the'lijne-SpaCe lever 25, the carriage-return arm, not shown, andthe carriage-release vlever, not shown, which are mountedjfon the carriage,"may have .movement with the carriage and yet-be operable'from without ythe casing, vthe: casing has, at the front thereof, a"s`lot 26 which extends longitudinally thereof and ,which is formed by the Alower trontedge 27 of the cover and the upper edge 2301l the frontwall 'of the casing-body. This slot is, however, closed, except where the levers extend therethrough, by means'of "a: cushion '29, :secured byscrews30 to the edge 2.701 the cover` ano by a cushion 31, secured by screws 32 to the levers with the carriage. The screws 32 may 'alsoserv'eto secure the front lining member or members 13 to the casing-body.

fBel'w the keyboard extension, the front wall of the casing-body comprises a crossmember 33. The comb-plate 34 of the typewritingfmachine is shown at Figure 2'above thecasing Vcross-piece 33; :and key-levers 35 are shown extending through lthe comb-plate of 'the machine. Above the comb-plate is the'fro'nt plate 36 of the machine, secured to the front corner-posts 137 of the machii'ieframe by, screws 38. In front-strike Inachins, suoli, Tfor instance, as the Underwood, the front lplate ordi'narilv has an arcuate cut 39 therein for access 'to the types 4() for cleaningof the latter. lFor sound-deadening j1`3urposes,.however, this cut'39 is 'closed by `a *correspondingly shaped v.plate 41, which, whenin place, 'forms lpart of' they front wall of Ithe machine.y Vl'leretofore, :this plate has been removable from the interior'fof the casing when the casing-cover is open, `vto permit of"access 'to-the types for cleaning. In accordance with'thepresent invention, the plate 41flis curled'at 4'2'at-itsA upper edge, and in the 'curl 42 is se't'a yrod 43,the ends of which are. pivotedat 44 in the segmental platform' 4501 the fron-t plate -36 of the machine. AWhen vaccessr tolthe types is desired, the'plate 41 isfsw'ung outward on its pivots 44, by'rn'ean's of anger-Qpieceet. The upper edges ofthe pla-tes 36 y'and 41 rest against a strip`t48jfo'f/the `front'lini'ng-"member; and the casing yis' Atherefore 4"closed tothe 'emission 'of sound lat this point. yThelining-m'embn' 48 being of yieldable materiaL-si'ich, for instance, a`sfelt,"fno obstruc'tion'is offered thereby to the forward swing of the plate 41 on its hinges. e,

`lir'order thatth'e platel or door 41 may itselfbe"schild-proof, it isli'ned inthe 'following manner.v 'Onfthe "p`lat`e'i41`V are shown live'bosses49 which are blindand which are threaded to receive screws 50, which `hold thereto a plate 5101 the 'same shape as the plate 41;'*theplate 51 being' set against the bosses 49,`and a sheet of sound-deadening material 52 being set-between theplates 41 and (5,1. Thesheet- V52 of sound-dea'dening material rests at its upper edge against the bead`42 of the plate 41,and 'at its lower edge projects 'slightly beyond A'the lower Vedge of the plate "41. rThe -plate 41 is suiliciently fsinaller'than 'thecut v'39 in the front plate 36ft'oper1nito'tsfuch projection ofthe liningnremberf'52. f'When, however, theplate or lc'loor41`is infcl'ose'd position, :the lining-inember52 closes the crack between the plates 41 vand 36, -to seal thelsameagaifnst emission "of sound.` Theoverlappingedge of the sounddeadening material 52is slightly wider than the `crack between the plates 41 and 36, but, the sound-deadening material being a yieldable material, such, for instance, as felt, the door 41 may, nevertheless, be closed. When it is closed, this overlapping edge of the material 52, by being vjammed between the two plates, holds the door closed against accidental displacement.

For opening the casing, there is an arm 53 hinged to an ear54 on the rear wall of the cover.k The arm 53 is pivoted at 55 to the rear arm of a lever 56. The lever 56 is. pivoted on a pin 57, which is secured to the side wall of the casing-body and which projects through the lining, v not shown, on the side wall of the casing-body. The forward arm 58 of the lever 56 is offset at 59 to provide an ear which carries a forwardly-projecting,pin 60. Loosely piv- Oted to the ear 59 by means of the pin 60, and held thereon by the head 61 of the pin, is Va link 62 which is pivotally connected at its other end at 63 to an arm 64, fast on a rock-shaft 65. The rocklshaft 65 passes through the front wall of the casing and has a handle-piece 66 secured by a set-screw 67 to its outer or forward end. To provide an extended bearing for the rock-shaft 65, a collar or sleeve 68 thereon bears against the outer side of the casing front wall, and is held against displacement, longitudinally of the shaft, by means of another collar 69 feo ' secured by a set-screw 70 to the shaft.

The shaft is free to turn in the sleeve 68. The collar 69 holds the shaft against rearward longitudinal displacement; and the hub 71 0f the arm 64 on the shaft 65, by bearing against the inside of the front plate of the casing, holds the shaft against forward longitudinal displacement. The liningmember 13 of the casing front wall is perforated to receive the hub 71 of thel arm 64, and may be slotted to receive the link 62. Vhen the palm of the Operators hand is pressed upon the handle 66 so as to turn the handle in vcounter-elockwise direction, the link 62 is thrust upward, and, by reason of its loose connection with the pin 60, causes the lever 56 Vto be rocked in counter-clockwise direction i (as viewed in Figure 1) around its pivot 57, thereby causing the arm 53 to be rocked down and pressed rearward. The rearward pressure of the arm 53 causes the cover-to swing open on its hinge 19. The movement of the handle 66 in the opposite direction causes the cover to be closed; or the cover may be closed by gravity, the opening connections being free to move therewith. The cover may also be opened by means of the usual handle 72 fast to the center front part of the cover.

The line-space lever 25 is a bell-crank lever pivoted at 73 toan ear 74 on the carriage-frame. The t longer, forwardly-extending Aarm of the lever 25 is lbent downward atV 75, then offset forward at 76 between vthe cushions 29 and 31, to the Aoutside ofthe casing where it carries a finger-piece 77 for ,ope-rating `the same. A. shorter arm 7 8 .of the line-space lever operates the lnespace mechanism'usually found in Underwood machines, and which comprises a slide 7 9having forward and backward movement on the carriage-frame. The slide 79 carries arpawl 8O for, operating the ratchet-wheel 81 fast to the platen-shaft 82. Movement of the line-space lever to the` right forces back the slide7 9 and causes the pawl80 to turn the ratchet-wheel- 4The slide 79 is returned` to normal position kby a spring,.not shown. i. t

The line-space leverhas movement between two blocks 83 and 84 on the front vrail 85 of the carriage. A cap-plate or guard 86 extends over the `lever 25 and is secured to the blocks 83 and 84 by screws 87 and 88. For returning the line-space lever to normal position after each operation thereof, there is a coil spring 89 secured at one end at 90 to a pin onthe arm 78- of the lever, and at its other end to a Vpin 91 on an ear 92 on the cap-plate 86. The ends of the spring 89. loosely engage they pins 90 and 91 so that the spring, as a whole, may have a pivotal movement on the pins when the lever is operated. yThis pivotal movement avoids bending of the spring whereit is connected to the pins. .Itwill be notedcthat, since the spring is connected at one end to the right-hand extremity of t-he lever, and at its other end connects to the left-hand extremity of the rail 85, the spring has considerable length. By reason of this length, and by reasonof the elimination of bending of the spring aty the pins`90 and 91, the strains thereon, incidental to the operation of the line-space lever, in movement of the same against the friction caused by the cushions, and which have heretofore resulted in breakage of lt-he spring, are here taken care of, and a.l spring is provided which is not only durable but which may have the strength `requisite to prompt operation of the lever against the friction of the cushions.

Variations may be resorted to within th scope ofthe invention, and portions of the improvements may be used without others. `Having thus described my invention, I claim: e

1; rThe combination with a sound-deadening casing for a front-strike typewriting machine having a platen, type-bars pivoted `to swing upward and rearward to the platen,

and arranged to form a segmental typebasket, a front plate having a vsegmental `opening therein in conformity with and for access to the type-basket for cleaning -of the sa n ' mentalplate -fornormally closing said segmental opening, the segmental plate being pivoted tothe front plate lto serve as a door whichfmfay be swung 'open at will.

The combination with .-a sound-deadening casing for a lfront-strike typewriting machine having-a platen, type-bars pivoted to swing upward and rearward to the platen, and arranged to form a ksegmental typebasket, afrontplate having Ha segmental opening therein in conformity with and for access tothe type-basket for cleaning of the types, and-a frame to which said front plate is so secured as to have a close iit with the frontwall of the casing at each side of the keyboard opening lin the latter; of a segmental plate fornormally closing said segmental opening, the segmental plate being pivoted to thel front plate to serve as a door which may benswung 'open at will, and being provided with a sound-deadening lining.

3. .The combination with a sound-deadening casi-ng for a front-strike typewriting machine having .a platen, type-bars pivoted to swing upward and rearward tothe platen, and arranged :to form a segmental typebasket,` a front Y plate having a segmental opening'therein in conformity with and for (access tol the type-basket for `cleaning of the types,`fand a-frame to which :said front'plate is `so 'secured as `to have al close fit'with the front wall of the casing at each rside of the keyboard opening fin the latter.; of a segmental plate for normally closing vsaid segmental open-ing, the segmental plate being .pivotedto the front plate to serve asia door which may be swung open at will,'and being provided with na hsound-deadening lining which 'projects slightly beyond the ledge of the segmental plate to' seal the joint between the two plates.

4. The combination with a` sound-deaden- 'ing casing for a front-strike ltypewriting machine vhaving a platen, type-bars pivoted to swing upwardand rearwardto the platen, fandarr'anged to form f a. segmental typebasket, a front plate having a :segmental openingtherein in 'conformity with andfor a'cce'ss to the typ'e-basketfor 'cleaning ofthe types,and aframe'zt'o which ksaid vfront plate .is .so-secured as 'to have a close tit with the front wall of the casing at each side of the keyboard opening 'in the `v latter; of a segmental "plate for 'normally closingsaid seglmental open-ing, the .segmental plate being pivoted .to the front plate to serve asa door which '.may be swung open at will, andbeing provided with a sound-deadening lining 'which v'is of soft flexible material, such, for instance, asfelt, and which projects slightly beyond the edge vof the-.segmental plate vto be jammed inthe joint between the ltwo plates :and thereby to serve to prevent accidental opening of the door.

5. The combination with a sound-deadenmental plate for normally closing said segmental opening, the segmental plate being hinged to the front plate at the upper edges lof the two plates and having a handle on the front thereof whereby the segmental plate may be swung open at will.

6. The combination with a sound-deadening casing for a front-strike typewriting machine having a platen, type-bars pivoted to swing upward and rearward to the platen, and arranged to form a segmental type-basket, a front plate having a segmental opening therein in conformity with and for access to the type-basket for cleaning of the types, and a frame to which said `frontplat-e is so secured 'as to have a close tit with the front wall ofthe casing atl each side of the keyboard lopening in the latter; of asegmental plate for normally closing said segmental opening, the upper edge of the segmental plate being curled and having hinge pins in the curl :for pivotally connecting the saine to the front plate, whereby 'the segmental plate may be opened-at will. r7. The kcombination with a sound-deadeningca'sing for a typewritingl machine having a platen, type-bars pivoted to swing to the platen, affront plate for the machine having an opening ytherein for access to the types for cleaning thereof, vand a frameto which said front 'plate is so secured as to have aclose lit with thelfront Vwall of thefcasing at each side olf f' the keyboard opening in the latter; of a door for the opening in said front plate, comprising two plates with a sheet of sound-deadeningmaterial between the same.

S. rlhe combination with a-sound-deaden ing casing for a. typewriting 'machine having -a platen, type-bars Vpivoted-to swing to the platen, frontl plate for the :machine 4having an opening there-in :for access to the types for cleaning thereof, and a frame -to which said frontplate -is so secured-as to have a close it with lthe front wall -of .the casing at each side of the `keyboard opening in the latter; of a door for the opening in said frontplate, comprising two plates with a sheet of sound-deadening material ening casing yfor a: typewriting machine having a platen, type-bars pivoted to swing to the platen, a front plate for the machine having' an opening the-rein tor access tothe types `for cleaning thereof, and a trame to which said front pla-te is so secured` as to have a close tit withlthe front wall of the casing at each sidey of the keyboard opening in the latter; of a. door for the opening in said vfro-nt plate, comprising twoplates with a sheet of sound-deadening material between the same, one otI the plates yhaving bosses thereon against which the other ot the door plates is set, and means for holding the plates together.

l0. The combination with a sound-deadening casing for a front-strike typewriting machine having a platen, type-bars pivoted to swing upward and rearward to the platen, and arranged to form a segmental typebasket, a front plate having a segmental opening therein in conformity with and for access to the type-basket for cleaning of the types, and a frame to which said front plate is so secured as to have a close lit with the front wall of the casing at each side of the keyboard opening in the latter; of .a segmental plate for normally closing said segmental opening, the segment-al plate being pivoted to the front plate to serve as a door which may be swung open at will; the sound-deadening casing containing the typewriting machine and having an opening' in the iront wall thereof, through which the keyboard extension of the machine projects, and which is closed above the keyboard extension of the machine by the frontplate of the machine, and by the door in the latter, when the machine is in place.

l1. The combination with a sound-deaden ing casing for a iront-strike typewriting machine having a platen, type-bars pivoted to swing upward and rearward to the platen, and arranged to i'orm a segmental type-bas` ket, a front plate having a segmental opening therein in conformity with and for access to the type-basket for cleaning of the types, and a frame to which said iront plate is so secured as to have a close lit with the iront wall of the casing at each side of the keyboard opening in the latte-r; of a segmental plate for normally closing said segn'lental opening, the segmental plate being pivoted to the 'liront plate to serve as a door which may be swung open a will; the sound-deadening casing containing the typewriting machine and having an opening in the tro-nt wall thereof, through which the keyboard extension of the machine plates and lining maprojects, andiwhich is closed above thekeyboa dextension of the machine by the front plate ot the machine and by the door inthe latter, when the machine is in place; and a strip oiilieizible lining material, such, for instance, as telt, serving as a closure `for the joint betweenthe casing and the topvot the front plate ofthe machine, and which is yieldable `to permit opening of the door.`

l2.iThe combination `with a soundf deadening casing, and fa typewriter within the casing having its keyboard projecting beyond the casing for operation, of a cover for the casing hinged at the rear to swing upwardly, a roclcarm mounted to swing aty one side of the keyboard in close prox-` imity thereto :for actuation by the operator,

and `mechanism directly connecting said rockfarm with saidhinged ycoverfwhereby, swinging down on the arm will cause direct upward swing of the cover.

13. The combination with a sounddeadening casing, and a typewriter within the casing having its keyboard projecting beyond the casing for operation, of a cover for the casing hinged at the rear to swing upwardly, a rock-arm mounted to swing at one side or' the keyboard in close proximity thereto for actuation by the operator, and mechanism directly connecting said rockarm with said hinged cover, whereby swinging down on the arm will cause direct upward swing of the cover, said connecting mechanism including toggle-links pivoted one on the cover and the other on the machine-frame whereby swinging the latter link by said rock-arm will raise the cover and hold it in raised position. Y

14;. The combination with a-sound-deadening casing, and a typewriter within the casing having its keyboard projecting beyond the casing for operation, of a cover for the casing hinged at the rear to swing upwardly, a rock-arm mounted to swing at one side of the keyboard in close proximity thereto for actuation by the operator, and mechanism directly connecting said rock-arm with said hinged cover, whereby swinging down on the arm will cause direct upward swing of the cover, said mechanism including toggle links that will raise the cover and maintain it in raised position, which mechanism on swinging said arm in opposite directon will break the toggle-links and directly cause re* turn of the cover to closed position.

15. The combination with a sound-deadening casing, and a typewriter within the casing having its keyboard projecting beyond the casing for operation, of a cover for the casing hinged at the rear to swing upwardly, a rock-shaft extending through the casing, an arm on the rock-shaft at one side ont the keyboard in proximity thereto for rocking said shaft by the operator with the hands in writing position, and actuating means directlyV connecting said shaft inside of the casing withthe cover to'cause swinging of suchf shaft by the operator to swing the cover upwardly.

16. The combination with a sound-deadening casing, and a typewriter within the cas ing having its keyboard projecting beyond thecasing for operation, of a cover for the casing hinged at theA rear to swing upwardly, ai rockf-shafteztending through the casing, anarin on the rocl =sliaft atene side of the keyboard in proximity'theretof forI rocking, said' shaftA by the` operatorwith the hands i in' writing positiorn and act-uatin means directly connectingl said' shaft lnsrde of the casingnwtli the cover to cause swinging of such shaft by the` operator to swing the cover upwardly, said shaft havingv another arlii#portion` arrangedV whereby depressionl of thev saine will directly swing the cover back to closed position. y

17. The combination with a sound-deadening casing, and a typewriter within the casing having its keyboard projecting beyond the casing for operation, of a ,cover for the casingA hinged at the rear to swing upwardly, a rockshaft extending through the casing, an arm on therock-shaft at one side of the keyboard in proximitythereto for rocking 30 saidy shaft by the operator with'the hands in writing position,V and actuatingV means directly connecting said shaft inside of' the casing with the cover to cause swinging of such shaft bythe operator to swing the cover upwardly, and which arm will close the open cover`w'l1en swung in theopposite direction. y p

ALFRED G.' F. KURGWSKI. 

